And Jesus came up and spoke to them, saying, "All authority has been given to Me in heaven and on earth.Matthew 28:18(NASB)
Christ fulfilled the righteousness of the Law, which qualified Him to pay the price for our sins on the Cross. His death, burial, and Resurrection conquered sin and Satan. His death, burial, and Resurrection broke the power of sin and death forever in the lives of all who would believe on His name. And as a result, God gave Him all authority in heaven and on earth.
Because of His sacrificial death and glorious Resurrection, God ascribed all authority to the Lord Jesus Christ Who was to become the federal head of a new creation of humanity - a new-creation 'in-Christ'.
Jesus lived a sinless life so that He could willingly give His life as a sacrifice for you and for me, and God raised Him from the dead and gave Him authority to bestow His own eternal life on all who would believe on His name, making Him Head of the Body, which is the Church, so that He Himself would have preeminence in all things.
Jesus had already demonstrated His God-given authority in His teachings, for no man spoke the gracious words that He spoke. He displayed His authority over sickness, disease, and those afflicted with various ailments and pains, and those oppressed by demons, epileptics, and paralytics: "And He healed them all."
He demonstrated His authority over Satan when He was tempted in the wilderness. He proved His authority on earth to forgive sins by saying to the paralyzed man: "Arise, and take up thy bed and walk," and He proclaimed His authority in the Temple of God when He accused the rulers of Israel, with the blistering words: "My house will be called a house of prayer for all nations, but you have made it a den of thieves."
We can have absolute confidence in our Lord and Saviour Jesus Christ, for there is no power in heaven or earth or under the earth that has not been placed under His supreme authority, in time and through eternity, for at the name of Jesus every knee will bow, of things in heaven, and on earth, and under the earth, and every tongue will confess that Jesus Christ is Lord, to the glory of God the Father.
Heavenly Father, I stand amazed at Your grace and goodness, and that You would give Your only begotten Son to live a perfect life and die a sacrificial death for me. Thank You that all power in heaven and earth is His and that I am secure in His hand. Keep me from unfounded worry and foolish fretting, knowing that He is in ultimate control of my life and that Your perfect plans and purposes for all humanity will finally be fulfilled through Him. To Him be all praise and glory forever and ever, AMEN.